Network Tools
DNS, SSL, IP, headers, and subnet diagnostics.
No required signupLocal-first saved work
Network Diagnostics
DNS, IP, WHOIS, SSL, Headers, Subnet.
Network required
DNS Lookup
A, AAAA, MX, TXT, NS records.
Network required
My IP Address
Your public IP and browser info.
Network required
IP Address Lookup
Geolocation, ISP, and ASN for any IP.
Network required
WHOIS / RDAP Lookup
Domain registration info.
Network required
SSL Certificate Checker
Inspect SSL cert chain.
Network required
HTTP Headers Checker
Inspect response headers.
Network required
Subnet Calculator
CIDR, netmask, hosts.
Network required
Frequently Asked Questions
Common questions about Network Tools.